Trimming attachment for sewing-machines



- I J. B. WILSON.- Trimming Attachment for Sewing-Machines No. 226,432;Patented Apr il l3, 1880.

STATES UNITED PATENT OFFICE.

JAMES E. WILSON, OF CHICAGO, ILLINOIS.

TRIMMING ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 226,432, dated April13, 1880.

Application filed August 14, 1870.

To all whom it may concern:

Be' it known that I, JAMES E. WILsoN, of Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Trimming Attachments for Sewing-Machines; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being had to the accom panying drawings,which form part of this specification.

Figure 1 is a representation of the throatplate of the sewing-machinewith the yielding spring or plate attached and showing the position ofthe knife. Fig. 2 is a plan view of the throat-plate having the yieldingplate or spring. Fig. 3 is a vertical section of my invention.

The object of my invention is to furnish for sewing-machines a devicethat will keep all dirt and trimmings made in trimming goods from beingforced down through the slot in the throat-plate of the sewing-machine,and to assist and make the knife of the trimmer cut and trim readily andperfectly all kinds of material, more especially soft material.

As the trimming-knife rises the yielding or spring plate A closes theslot 0 in the throatplate D, except where the point of the knife Benters the slot 0 in the throat-plate. The flat side of the knife B fitsclosely against the edge of the slot 0, and against the beveled side ofthe knife the yielding or spring plate A fits closely, so that when theknife is driven downward the slot in the throat-plate is kept closed,thus keeping loose material or dirt and bits of trimmings from beingforced through the slot in the throat-plate of a sewing-machine to clogand obstruct the machinery of the same. This yielding or spring plate isa great .help in aiding the trimming-knife to cut and trim soft materialeasily and successfully, as it brings a cutting-edge closely against thebevyeled side of the knife.

I am aware that a slot has been cut in 'thc bed-plate of the machinethat is much wider than is necessary for the cutter or chisel, and

that a sliding plate that is actuated by a springhas been placed in theslot and forced against the knife, and this I disclaim.

In my invention but a'narrow slot is cut in the bed-plate, and thespring-plate itself forms the guard for the slot.

Having thus described my invention, I claim The combination of thethroat-plate D, having a narrow slot, 0, with the knife B andspring-plate A, the said spring-plate being secured to the edge of thethroat-plate and made to form a guard for the slot, substantially asshown and described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES E. WILSON.

Witnesses S. E. MCDOWELL, SAML. HOFMAN.

